36 Chapter 1 Whole Numbers Section 1.4 Practice Exercises Study Skills Exercise Purchase a three-ring binder for your math notes and homework. Use section dividers to separate each chapter that you cover in the text. Keep your homework and notes in the appropriate section.What other course materials might you keep organized in your notebook? Vocabulary and Key Concepts 1. A process called _______ is common practice when the exact value of a number is not required. Review Exercises 2. A triangle has sides of length 5 ft, 12 ft, and 13 ft. Find the perimeter. For Exercises 3–6, add or subtract as indicated. 3. 4. 5. 6. 7. Determine the place value of the digit 6 in the number 1,860,432. 8. Determine the place value of the digit 4 in the number 1,860,432. Concept 1: Rounding 9. Explain how to round a whole number to the hundreds place. 10. Explain how to round a whole number to the tens place. For Exercises 11–28, round each number to the given place value. (See Examples 1–4.) 11. 342; tens 12. 834; tens 13. 725; tens 14. 445; tens 15. 9384; hundreds 16. 8363; hundreds 17. 8539; hundreds 18. 9817; hundreds 19. 34,992; thousands 20. 76,831; thousands 21. 2578; thousands 22. 3511; thousands 23. 9982; hundreds 24. 7974; hundreds 25. 109,337; thousands 26. 437,208; thousands 27. 489,090; ten-thousands 28. 388,725; ten-thousands 29. In the first weekend of its release, the 30. The average per capita personal income movie Avatar grossed $77,025,481. in the United States in a recent year was Round this number to the millions $33,050. Round this number to the nearest place. thousand. 31. The average center-to-center distance 32. A shopping center in Edmonton, from the Earth to the Moon is Alberta, Canada, covers an area of 238,863 mi. Round this to the thousands 492,000 square meters 1m22. Round this place. number to the hundred-thousands place. 12,033 23,441 4009 998 130 98 59 33
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